Commit | Line | Data |
---|---|---|
f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
f3ed775e DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
f3ed775e DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
f3ed775e DG |
19 | #include <popt.h> |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
20fb9e02 | 26 | #include <stdbool.h> |
8bb32452 | 27 | #include <lttng/lttng.h> |
f3ed775e | 28 | |
c399183f | 29 | #include "../command.h" |
f3ed775e | 30 | |
65f25c66 | 31 | #include <common/mi-lttng.h> |
42224349 | 32 | #include <common/sessiond-comm/sessiond-comm.h> |
1dac0189 | 33 | #include <common/utils.h> |
42224349 | 34 | |
fd076c09 | 35 | static char *opt_session_name; |
b09ee5ba | 36 | static int opt_destroy_all; |
e20ee7c2 | 37 | static int opt_no_wait; |
f3ed775e | 38 | |
4fc83d94 PP |
39 | #ifdef LTTNG_EMBED_HELP |
40 | static const char help_msg[] = | |
41 | #include <lttng-destroy.1.h> | |
42 | ; | |
43 | #endif | |
44 | ||
65f25c66 JRJ |
45 | /* Mi writer */ |
46 | static struct mi_writer *writer; | |
47 | ||
f3ed775e DG |
48 | enum { |
49 | OPT_HELP = 1, | |
679b4943 | 50 | OPT_LIST_OPTIONS, |
f3ed775e DG |
51 | }; |
52 | ||
53 | static struct poptOption long_options[] = { | |
54 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
55 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
b09ee5ba | 56 | {"all", 'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0}, |
679b4943 | 57 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
e20ee7c2 | 58 | {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0}, |
f3ed775e DG |
59 | {0, 0, 0, 0, 0, 0, 0} |
60 | }; | |
61 | ||
f3ed775e | 62 | /* |
b09ee5ba FG |
63 | * destroy_session |
64 | * | |
65 | * Unregister the provided session to the session daemon. On success, removes | |
66 | * the default configuration. | |
f3ed775e | 67 | */ |
65f25c66 | 68 | static int destroy_session(struct lttng_session *session) |
f3ed775e DG |
69 | { |
70 | int ret; | |
1dac0189 | 71 | char *session_name = NULL; |
d316866a | 72 | bool session_was_already_stopped; |
8bb32452 JG |
73 | enum lttng_error_code ret_code; |
74 | struct lttng_destruction_handle *handle = NULL; | |
d316866a JG |
75 | enum lttng_destruction_handle_status status; |
76 | bool newline_needed = false, printed_destroy_msg = false; | |
8bb32452 | 77 | enum lttng_rotation_state rotation_state; |
d316866a | 78 | char *stats_str = NULL; |
f3ed775e | 79 | |
e20ee7c2 JD |
80 | ret = lttng_stop_tracing_no_wait(session->name); |
81 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
82 | ERR("%s", lttng_strerror(ret)); | |
83 | } | |
d316866a JG |
84 | |
85 | session_was_already_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED; | |
e20ee7c2 | 86 | if (!opt_no_wait) { |
e20ee7c2 JD |
87 | do { |
88 | ret = lttng_data_pending(session->name); | |
89 | if (ret < 0) { | |
90 | /* Return the data available call error. */ | |
91 | goto error; | |
92 | } | |
93 | ||
94 | /* | |
d316866a JG |
95 | * Data sleep time before retrying (in usec). Don't |
96 | * sleep if the call returned value indicates | |
97 | * availability. | |
e20ee7c2 JD |
98 | */ |
99 | if (ret) { | |
d316866a JG |
100 | _MSG("Destroying session %s", session->name); |
101 | newline_needed = true; | |
102 | printed_destroy_msg = true; | |
103 | fflush(stdout); | |
01f55be4 | 104 | |
ea0f4f56 | 105 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
e20ee7c2 JD |
106 | _MSG("."); |
107 | fflush(stdout); | |
108 | } | |
109 | } while (ret != 0); | |
e20ee7c2 | 110 | } |
d316866a JG |
111 | |
112 | if (!session_was_already_stopped) { | |
20fb9e02 JD |
113 | /* |
114 | * Don't print the event and packet loss warnings since the user | |
115 | * already saw them when stopping the trace. | |
116 | */ | |
d316866a JG |
117 | ret = get_session_stats_str(session->name, &stats_str); |
118 | if (ret < 0) { | |
119 | goto error; | |
120 | } | |
20fb9e02 | 121 | } |
e20ee7c2 | 122 | |
8bb32452 JG |
123 | ret_code = lttng_destroy_session_ext(session->name, &handle); |
124 | if (ret_code != LTTNG_OK) { | |
125 | ret = -ret_code; | |
b09ee5ba | 126 | goto error; |
f3ed775e DG |
127 | } |
128 | ||
8bb32452 JG |
129 | if (opt_no_wait) { |
130 | goto skip_wait_rotation; | |
131 | } | |
132 | ||
133 | do { | |
d316866a JG |
134 | status = lttng_destruction_handle_wait_for_completion( |
135 | handle, DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US / | |
136 | USEC_PER_MSEC); | |
8bb32452 JG |
137 | switch (status) { |
138 | case LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT: | |
d316866a JG |
139 | if (!printed_destroy_msg) { |
140 | _MSG("Destroying session %s", session->name); | |
141 | newline_needed = true; | |
142 | printed_destroy_msg = true; | |
8bb32452 JG |
143 | } |
144 | _MSG("."); | |
145 | fflush(stdout); | |
146 | break; | |
147 | case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED: | |
148 | break; | |
149 | default: | |
d316866a JG |
150 | ERR("%sFailed to wait for the completion of the destruction of session \"%s\"", |
151 | newline_needed ? "\n" : "", | |
8bb32452 | 152 | session->name); |
d316866a | 153 | newline_needed = false; |
8bb32452 JG |
154 | ret = -1; |
155 | goto error; | |
156 | } | |
157 | } while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT); | |
158 | ||
159 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
160 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
d316866a JG |
161 | ERR("%sFailed to get the result of session destruction", |
162 | newline_needed ? "\n" : ""); | |
8bb32452 | 163 | ret = -1; |
d316866a | 164 | newline_needed = false; |
8bb32452 JG |
165 | goto error; |
166 | } | |
167 | if (ret_code != LTTNG_OK) { | |
57b5b1cf | 168 | ret = -ret_code; |
8bb32452 JG |
169 | goto error; |
170 | } | |
171 | ||
d316866a JG |
172 | status = lttng_destruction_handle_get_rotation_state( |
173 | handle, &rotation_state); | |
711a9f39 | 174 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { |
d316866a JG |
175 | ERR("%sFailed to get rotation state from destruction handle", |
176 | newline_needed ? "\n" : ""); | |
177 | newline_needed = false; | |
711a9f39 JG |
178 | goto skip_wait_rotation; |
179 | } | |
d316866a | 180 | |
8bb32452 JG |
181 | switch (rotation_state) { |
182 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
183 | break; | |
d316866a | 184 | case LTTNG_ROTATION_STATE_COMPLETED: |
8bb32452 JG |
185 | { |
186 | const struct lttng_trace_archive_location *location; | |
187 | ||
d316866a JG |
188 | status = lttng_destruction_handle_get_archive_location( |
189 | handle, &location); | |
8bb32452 | 190 | if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { |
d316866a JG |
191 | ret = print_trace_archive_location( |
192 | location, session->name); | |
8bb32452 | 193 | if (ret) { |
d316866a JG |
194 | ERR("%sFailed to print the location of trace archive", |
195 | newline_needed ? "\n" : ""); | |
196 | newline_needed = false; | |
8bb32452 JG |
197 | goto skip_wait_rotation; |
198 | } | |
199 | break; | |
200 | } | |
201 | /* fall-through. */ | |
d316866a JG |
202 | } |
203 | default: | |
204 | ERR("%sFailed to get the location of the rotation performed during the session's destruction", | |
205 | newline_needed ? "\n" : ""); | |
206 | newline_needed = false; | |
8bb32452 JG |
207 | goto skip_wait_rotation; |
208 | } | |
209 | skip_wait_rotation: | |
d316866a | 210 | MSG("%sSession %s destroyed", newline_needed ? "\n" : "", |
8bb32452 | 211 | session->name); |
d316866a JG |
212 | newline_needed = false; |
213 | if (stats_str) { | |
214 | MSG("%s", stats_str); | |
215 | } | |
1dac0189 PPM |
216 | |
217 | session_name = get_session_name_quiet(); | |
218 | if (session_name && !strncmp(session->name, session_name, NAME_MAX)) { | |
219 | config_destroy_default(); | |
220 | } | |
65f25c66 JRJ |
221 | |
222 | if (lttng_opt_mi) { | |
223 | ret = mi_lttng_session(writer, session, 0); | |
224 | if (ret) { | |
225 | ret = CMD_ERROR; | |
226 | goto error; | |
227 | } | |
228 | } | |
229 | ||
f3ed775e | 230 | ret = CMD_SUCCESS; |
b09ee5ba | 231 | error: |
d316866a | 232 | if (newline_needed) { |
26603837 JG |
233 | MSG(""); |
234 | } | |
8bb32452 | 235 | lttng_destruction_handle_destroy(handle); |
1dac0189 | 236 | free(session_name); |
d316866a | 237 | free(stats_str); |
b09ee5ba FG |
238 | return ret; |
239 | } | |
f3ed775e | 240 | |
b09ee5ba FG |
241 | /* |
242 | * destroy_all_sessions | |
243 | * | |
244 | * Call destroy_sessions for each registered sessions | |
245 | */ | |
65f25c66 | 246 | static int destroy_all_sessions(struct lttng_session *sessions, int count) |
b09ee5ba | 247 | { |
57b5b1cf JG |
248 | int i; |
249 | bool error_occurred = false; | |
b09ee5ba | 250 | |
57b5b1cf | 251 | assert(count >= 0); |
b09ee5ba FG |
252 | if (count == 0) { |
253 | MSG("No session found, nothing to do."); | |
254 | } | |
60e835ca | 255 | |
b09ee5ba | 256 | for (i = 0; i < count; i++) { |
57b5b1cf JG |
257 | int ret = destroy_session(&sessions[i]); |
258 | ||
b09ee5ba | 259 | if (ret < 0) { |
57b5b1cf JG |
260 | ERR("%s during the destruction of session \"%s\"", |
261 | lttng_strerror(ret), | |
262 | sessions[i].name); | |
263 | /* Continue to next session. */ | |
264 | error_occurred = true; | |
b09ee5ba | 265 | } |
b73d0b29 | 266 | } |
57b5b1cf JG |
267 | |
268 | return error_occurred ? CMD_ERROR : CMD_SUCCESS; | |
f3ed775e DG |
269 | } |
270 | ||
271 | /* | |
843f5df9 | 272 | * The 'destroy <options>' first level command |
f3ed775e DG |
273 | */ |
274 | int cmd_destroy(int argc, const char **argv) | |
275 | { | |
b09ee5ba | 276 | int opt; |
65f25c66 | 277 | int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 278 | static poptContext pc; |
b09ee5ba | 279 | char *session_name = NULL; |
68c7f6e5 | 280 | const char *leftover = NULL; |
f3ed775e | 281 | |
65f25c66 JRJ |
282 | struct lttng_session *sessions; |
283 | int count; | |
284 | int found; | |
285 | ||
f3ed775e DG |
286 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
287 | poptReadDefaultConfig(pc, 0); | |
288 | ||
289 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
290 | switch (opt) { | |
291 | case OPT_HELP: | |
4ba92f18 | 292 | SHOW_HELP(); |
b09ee5ba | 293 | break; |
679b4943 SM |
294 | case OPT_LIST_OPTIONS: |
295 | list_cmd_options(stdout, long_options); | |
b09ee5ba | 296 | break; |
f3ed775e | 297 | default: |
f3ed775e | 298 | ret = CMD_UNDEFINED; |
b09ee5ba | 299 | break; |
f3ed775e | 300 | } |
b09ee5ba | 301 | goto end; |
f3ed775e DG |
302 | } |
303 | ||
65f25c66 | 304 | /* Mi preparation */ |
c7e35b03 | 305 | if (lttng_opt_mi) { |
65f25c66 JRJ |
306 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
307 | if (!writer) { | |
308 | ret = -LTTNG_ERR_NOMEM; | |
309 | goto end; | |
310 | } | |
311 | ||
312 | /* Open command element */ | |
313 | ret = mi_lttng_writer_command_open(writer, | |
314 | mi_lttng_element_command_destroy); | |
315 | if (ret) { | |
316 | ret = CMD_ERROR; | |
317 | goto end; | |
318 | } | |
319 | ||
320 | /* Open output element */ | |
321 | ret = mi_lttng_writer_open_element(writer, | |
322 | mi_lttng_element_command_output); | |
323 | if (ret) { | |
324 | ret = CMD_ERROR; | |
325 | goto end; | |
326 | } | |
327 | ||
328 | /* For validation and semantic purpose we open a sessions element */ | |
329 | ret = mi_lttng_sessions_open(writer); | |
330 | if (ret) { | |
331 | ret = CMD_ERROR; | |
332 | goto end; | |
333 | } | |
334 | } | |
335 | ||
336 | /* Recuperate all sessions for further operation */ | |
337 | count = lttng_list_sessions(&sessions); | |
338 | if (count < 0) { | |
56c3ec9e JR |
339 | ERR("%s", lttng_strerror(count)); |
340 | command_ret = CMD_ERROR; | |
65f25c66 JRJ |
341 | success = 0; |
342 | goto mi_closing; | |
c7e35b03 JR |
343 | } |
344 | ||
fd076c09 | 345 | /* Ignore session name in case all sessions are to be destroyed */ |
b09ee5ba | 346 | if (opt_destroy_all) { |
65f25c66 JRJ |
347 | command_ret = destroy_all_sessions(sessions, count); |
348 | if (command_ret) { | |
349 | success = 0; | |
350 | } | |
351 | } else { | |
352 | opt_session_name = (char *) poptGetArg(pc); | |
353 | ||
1dac0189 | 354 | if (!opt_session_name) { |
65f25c66 JRJ |
355 | /* No session name specified, lookup default */ |
356 | session_name = get_session_name(); | |
357 | if (session_name == NULL) { | |
358 | command_ret = CMD_ERROR; | |
359 | success = 0; | |
360 | goto mi_closing; | |
361 | } | |
362 | } else { | |
363 | session_name = opt_session_name; | |
364 | } | |
fd076c09 | 365 | |
65f25c66 JRJ |
366 | /* Find the corresponding lttng_session struct */ |
367 | found = 0; | |
368 | for (i = 0; i < count; i++) { | |
369 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
370 | found = 1; | |
371 | command_ret = destroy_session(&sessions[i]); | |
372 | if (command_ret) { | |
373 | success = 0; | |
57b5b1cf JG |
374 | ERR("%s during the destruction of session \"%s\"", |
375 | lttng_strerror(command_ret), | |
376 | sessions[i].name); | |
65f25c66 | 377 | } |
65f25c66 JRJ |
378 | } |
379 | } | |
380 | ||
381 | if (!found) { | |
382 | ERR("Session name %s not found", session_name); | |
383 | command_ret = LTTNG_ERR_SESS_NOT_FOUND; | |
384 | success = 0; | |
385 | goto mi_closing; | |
386 | } | |
387 | } | |
388 | ||
68c7f6e5 JD |
389 | leftover = poptGetArg(pc); |
390 | if (leftover) { | |
391 | ERR("Unknown argument: %s", leftover); | |
392 | ret = CMD_ERROR; | |
393 | success = 0; | |
394 | goto mi_closing; | |
395 | } | |
396 | ||
65f25c66 JRJ |
397 | mi_closing: |
398 | /* Mi closing */ | |
399 | if (lttng_opt_mi) { | |
400 | /* Close sessions and output element element */ | |
401 | ret = mi_lttng_close_multi_element(writer, 2); | |
402 | if (ret) { | |
fd076c09 | 403 | ret = CMD_ERROR; |
b09ee5ba FG |
404 | goto end; |
405 | } | |
fd076c09 | 406 | |
65f25c66 JRJ |
407 | /* Success ? */ |
408 | ret = mi_lttng_writer_write_element_bool(writer, | |
409 | mi_lttng_element_command_success, success); | |
410 | if (ret) { | |
411 | ret = CMD_ERROR; | |
412 | goto end; | |
413 | } | |
f3ed775e | 414 | |
65f25c66 JRJ |
415 | /* Command element close */ |
416 | ret = mi_lttng_writer_command_close(writer); | |
417 | if (ret) { | |
418 | ret = CMD_ERROR; | |
419 | goto end; | |
420 | } | |
421 | } | |
f3ed775e | 422 | end: |
65f25c66 JRJ |
423 | /* Mi clean-up */ |
424 | if (writer && mi_lttng_writer_destroy(writer)) { | |
425 | /* Preserve original error code */ | |
426 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
427 | } | |
428 | ||
fd076c09 | 429 | if (opt_session_name == NULL) { |
b09ee5ba FG |
430 | free(session_name); |
431 | } | |
fd076c09 | 432 | |
65f25c66 JRJ |
433 | /* Overwrite ret if an error occurred during destroy_session/all */ |
434 | ret = command_ret ? command_ret : ret; | |
435 | ||
fd076c09 | 436 | poptFreeContext(pc); |
f3ed775e DG |
437 | return ret; |
438 | } |